Tetsuya Tani injured his left leg while trying to score from third in the 6th inning of today's exhibition game against Lotte at Nagoya Dome. He was examined at hospital in Nagoya and diagnosed with a fracture in his left fibula. It will take about four weeks for the bones to heal, after which point he will begin his rehab.
Source: Sports Hochi 3/23/2013
UPDATE @ 9:29pm - Tani will undergo additional testing on Monday before deciding what comes next. Surgery is a possibility.
Source: Nikkan Sports 3/23/2013